Arrangement for reversing internal-combustion engines.



M. R. M ATTI. ARRANGEMENT FOB. REVERSING INTERHAL COMBUSTION ENGINES.APPLICATION FILED SEPT. o, 1913.

1,130,833. I Patented Mar. 9, 1915.

3 SHEETS-SHEET 1 WITNESSES: INVEN T0 W 57 v 7% cfi ia; ATTORNEY.

THE NORRIS PEYERS ca. PHUIG-IJTHG. WASHIIIGIUN. D. I:

M. R. M ATTI. ARRANGEMENT ran RBVERSING INTERNAL COMBUSTION ENGINES.APPLICATION FILED SEPT. 9I 1913.

1,1 30,833. Patnted Mar. 9, 1915.

3 SHBETSSHBET 2- WI TNESSES w 03, wimlwmfi I1 TTORNEY.

1 NORRIS PETERS 60.. PHOTDJJTHO" WASHINGIDN. D C- m. R. MATTI.ARRANGEMENT FOB BBVBBSING INTERNAL COMBUSTION ENGINES.

APPLICATION FILED SEPT. 9. 19 13.

Patented Mar. 9, 1915.

IIIIH-I-I IIII IIIIII r! I I I I I I T NORKIS PETERS 00.. FHOTDLITHQ,WASHINGTON. By C nanylthreaded a-, engage threads on tainnroirnnni/riirfl, or was; swnin'nii.

' amane mamron'aav as e INTERNAL-COMBUSTION Emma' To all whom it mayconcern Be it known that I, MAX- engineer, citizen of Sweden, residingat Falun, in the Kingdom of Swedemhave 1nvented certain new and usefulImprove ments in Arrangements for Reversing Internal-C0mbustion Engines,of which the following is a specification.

My invention has reference to internal combustion-engines, andespecially to that class of engines provided with a controlling memberfor varying the feed of-fuelto the engine cylinder and provided withmeans fortimingthe-explosions according to the position ofthepiston ofthe engine. When engines of this kind shallbe reversed, 110W? ever, thereversal cannot be effected until the speed of the engine I has beenconsiderably decreased. In order to avoid this inconvenience and to makethe feed offuel inde-; pendent of the time of reversal, my inventionprovides fora means whereby the action is made entirely automatic inthat the reversal ofthe stroke of the fuel pump is effected onlyafter-the speedof the engine,

due to a previous interruption of the eX- plosions, has beensufliciently decreased to effectively reverse the engine piston, afterwhich the parts controlling the feed of the fuel return to theirnormalpositions.

- In the drawing Figure lis a longitudinal section of aconstruotionalform of the regu-- a is a1-reciprocating rod which may beo'peratedby a'cam' or an eccentricon the engine shaft-and which carriesthe sleeve 0 provided with. a cam-portionb, which on: coming in contactwith aroll 4' secured to a bar 6:. moves the latter as the rod areciprocates. The rod a, issoarrangedthatit can varying the position ofthe sleeve 0 relative to the rod a whereby the timeout feeding of thefuel and'air to theengine cylinder can be varied. To this end the sleevecis interthe rode, the sleeve 0 upon the turning of therod a beingguided by a pin 7 entering a" longitudinal groovein a sleeve gsurrounding sleeve-0. The pinis' fixed inthe sleeve c .f .i.

Specification of Le'tters Paten t.

RICHARD MATTI,

vided with a scale, and upon the end'of therod is secured a nut hwhereby the rod acan befturned' to move the sleeve 0 longitudinallyalong said rod and thereby vary thetime ofthe feed of the fuel and airduringthe running of the engine. 7

For reversing a special provided, which is secured to the .sleeve 0 andthe rod 11 insuch a manner that it always eifects the reversal of thestrokeof the pump piston at a precise-position of the engine piston,independent of'the relative posltlons ofthe sleeve 0 and'rod a. Forthispurpose the cam-piece b is arranged on a H I PatentedMar.9,1915 .f

' Application filed September 9,1913. Serial No.788,912. 7 i

cam-piece ,b is

bar 70 adapted to slide in a corresponding groove ofsleeve 0. This bar70 is also secured to the circumference of: a disk Z which rotateswithbut does not slide relative to the rod a. Consequently, ifvthepositionof sleeve 0 andtherebyof cam 0 be changed by the turning of thenut 71. on the'rod a the cam-piece b will retain its position relativeto the rod also that it will always act on thebar cZ at eXactlythe sameposition of the engine piston. Y

- The longitudinal movement of sleeve g i is prevented by a pine, (Fig.1), but the sleeve At-nor-malspeed the sleeve g and handlef will occupythe position shown-in Fig. l.

When-the engine shall be reversed the sleeve 9, by means of the handlef, is turned into the position shown in Fig. 3 and with it the sleeve 0,in whichposition the cam-piece bwill be brought under the rollz' on thebar (1],

(Figs. 1 and. 3). The sleeve 9 is held in this position against thetension ofa spring" 5 (shownin Fig. 3) by a pawlt which;

engagesa notch in a movable piece 6 mounted in a disk g, which diskforms part ofthe slee've'gw The notch-in said piece 6-is-so arrangedthatwhen the latter is moved to the position shown in Fig. 8, the pawl l isI immediately act through the roll 2' on the bar cl after the sleeves-gand c-have been turned by the handle f into the position;

shown in Fig. 3, as in that case a-counterexplosion would'occur whichwould endanger the engine, the spe'edof the latter must first bedecreased. Tothis end, as the sleevesg and are turned into the positionshown in Fig. 3, the bar (Z carrying'roll i is' lifted, therebypreventing the cam-piece bf from 5 coming in contact with said roll, andfur-' thermore a means is provided to prevent the cam-piece- Z) fromengaging roll d until the speed of the engine has been so farrde creasedthat it can be safely reversed. The device for lifting the bar (Z is.shown in Fig. 2 and consists of a projection'm-fixed to the movable.part 9. As sleeves g and, 0 are turned, the projection m comes incontact with the spindle n of rollv i, thereby raising the latter andwith it the bar d to such an extent thatv the cam-piece b is preventedfrom engaging the roll In thisposition of the parts the engine, will runfor a time without a supply of, fuel and the speed, therefore, willgradually decrease. When the speed has sufficiently decreased, thereversal can be. effected, for Whichpurpose the projection m is. withdrawn fromunder the spindle n of roll 2' allowing the latter and the baralto descend, so that the cam-piece Z) can engage the roll i. In Figs.5to 8 0 indicates a reciprocating 1 member provided with two prongs pand 1",

adapted to be engaged by prongs t and. u respectively of a tiltingmember s, which member is also provided with an arm as. A spring insideacasing v ,tends'to keep the arm wof the tilting-member sin the positionshownin Figs. 6 to 8. Arm w is fulcrumed 35. on a pivot 3 on which thecasing o inclosing the spring is suspended and the pivot y is mounted,in the movable piece 6.

The reciprocating member 0 is fastened by screws to the same part bywhich the rod 40 a above mentioned is'moved back and forth so that themember 0 will reciprocate at the same speed as the rod a. As long asthis speed is greatenough, the prongs t and 2/ will pass each otherwithout having time to catch. As soon, however, as the speed of theengine, and thereby of the reciprocating member 0 has been sufficientlydecreased, the prong p on member 0 will engage the prong t on thetilting member s, and the movable V piece 6 will be-moved to the left inFig. 6,

whereby the projection m willbe withdrawn from under the roll 2' on bar03, a spring 2 surrounding a bolt 3 secured to the disk 9 being at the.same time compressed, Upon thenext stroke 'of the pump piston,therefore, the cam-piece 6, coming in contact with the roll 2' of thebar d will cause an 1 7 especially large quantity of fuel to be fed tothe engine, whereby a counter-explosion is 50 effected sufficientlystrong to reverse theengine piston. As soon as'the engine has thus beenreversed, the cam-piece Z9 returns to its original position, shown inFig. 4:, so that the fuel feed again becomes normal.- In.

order that the said cam piece I). act only at The essential feature ofmy invention lies in said fuel pump, said cam-piece being ar' 125.

the time when the reversal of the engine left in Figs. 6 and l'. Themovable piece 6 is now moved still farther to the left,'the

position show'n inFig. 8 being reached approximately at the sametnne asthe reversing stroke of the pump piston isfinished In this position ofthe movable piece '6 the pawl 4, as above mentioned, is withdrawn,permitting the sleevesg and 0, to bereturned, to their originalpositions shown in Fig. 4 by the spring 5. In thispositionof the partsthe cam Z2 is again under the roll 2' and the operation of the fuelfeed'pump continues as usual] In order that theprojection m when in theposition shown in Fig. 6 or 7 be not moved to e the right; in saidfigures, the "tension of the springs2 andl5 is so adjustedas to cause asufficient friction between the" pawl a and the movable piece6to'preventspring 2 from moving'piece 6 to the right in Fig. '6 or 7; As soon,however, .as the pawl a has-released the movable piece 6, which occurswhen the latter has been moved to the position shown in Fig. 8, theprojec- Y tion we is moved by spring 2- tothe right in 95 Fig. 8, andthereby also the piece 6, while,

as has already been stated, the disk 9 and sleeves g and c are returned.to their normal positions by the spring. r

It is evident that many changes may be made in the embodiment ofmyinvention as 7 shown in the drawing, without departing thereby from thespirit of my invention.

this that the camwhereby the reversal of the engine iseffected, is notbrought in-'en-- gagement with the members controlling the feed of thefuel until the speed of the engine has'been decreased to such'anextentias-to permit the reversal of the engine-to take place withoutany danger to the engine, anda further essential feature of myinventionis that thefeeding of the fuel to the engine cylinder is influenced bysaidcam-piece only at one single stroke of the fuel pump piston, atwhich stroke the fuel supply tothe engine cylinder is greaterthanthenormal fuel" supply. I

7 I claim as my invention l 1. In. internal combustion engines thecombination with the engine cylinder and the reciprocating piston, of afuel pump, a reciprocating cam-piece adapted to operate ranged tocomplete the;cycle,of operationof said fuel pump 'in both, directionsofmovement of the said, reciprocating piston prior to its completing itsstroke, andfmeans for reciprocating said cam-piece. 1 i

2. In interal combustion engines thecombination with the engine cylinderand the reciprocating piston, of a fuel pump, a reciprocating cam-pieceadapted to operate said fuel pump, said cam-piece being arranged tocomplete the cycle of operation of said fuel pump in both directions ofmovement of the said reciprocating piston prior to its completing itsstroke, means for reciprocating said cam-piece, a movable sleevecarrying said cam-piece, a second cam-piece arranged on said sleeve foreffecting the reversal of the engine, and means for reciprocating saidsleeve.

3. In internal combustion engines the combination with the enginecylinder and the reciprocating piston, of a fuel pump, a reciprocatingcam-piece adapted to operate said fuel pump, said cam-piece beingarranged to complete the cycle of operation of said fuel pump in bothdirections of movement of the said reciprocating piston prior of saidfuel pump in both directions ofmovement of the said reciprocating pistonprior to its completing its stroke, means for reciprocating saidcam-piece, a movable sleeve carrying said cam-piece, a second cam-piecearranged on said sleeve for efond cam-piece from operating said fuelpump.

5. In internal combustion engines the combination with the enginecylinder and the reciprocating piston, of a fuel pump, a reciprocatingcam-piece adapted to operate said fuel pump, said cam-piece beingarranged to complete the cycle of operation of said fuel pump in bothdirections of movement of the said reciprocating piston prior to itscompleting its stroke, means for reciprocating said cam-piece, a movablesleeve carrying said campiece, a second cam-piece arranged on saidsleeve for effecting the reversal of the engine, means forreciprocatingsaid sleeve, means for adjusting the position of said second campiecerelative to said first cam-piece, a movable projection adapted toprevent said second cam-piece from operating said fuel pump, and atilting member adapted to cooperate with said movable projection, whenthe speed of the engine has been reduced to withdraw the said projectionpermitting the said second cam-piece to operate the fuel pumpsubstantially as and for the purpose described.

In testimony whereof I have aflixed my signature in presence of twowitnesses.

MAX RICHARD MATTI.

Witnesses GRETA Pnrsnn, HARRY ALBIHN.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents,

Washington, D. G.

